JPS61155041A - Wiper device for automobile - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a window cleaning device, particularly a window cleaning device for automobiles.

[Prior art]

The wire 14 reciprocates between two reversible positions within the wiping area during normal wiping operations, and when the window wiping device is shut off by the operating switch, it moves to a lowered so-called permanent position outside the wiping area. Mobile window cleaning devices for automobiles are already known. In that case, the motor rotates in one direction of rotation when the window wiping device is connected and during normal continuous and intermittent wiping operations. Next, when the operating switch is turned off, a motor reversal signal is obtained from the switching of the position switch during idle. During the next wiping cycle when the direction of rotation of the motor is changed, the eccentric wheel of the crank transmission between the motor and the wire is changed, expanding the inside of the wiping area and removing the wiping area outside the driver's field of vision. The wiper moves into its permanent position.

The position switch is then switched in the same direction as before, thereby stopping the motor. In this way, Wai Kai is moved to the lowered position.

[Problems to be Solved by the Invention] In the case of intermittent wiping operation, the motor rotates in the same direction as in continuous wiping operation. During the downtime between two wiping cycles, the W/4 should not be in the lowered, permanent position. However, it has been discovered that during the downtime the wiper is not moved to an inverted position adjacent to its permanent position, but to a position deep within the wiping area. At the end of a continuous wiping operation, the motor reverses its direction of rotation before the last wiping cycle and is not in a reversal position adjacent to the resident position, but rather within the normal wiping zone. was recognized. Therefore, during intermittent operation, the wiper 9 does not reach the reversing position device adjacent to the permanent position. Even during the final wiping cycle of a continuous operation operated in the normal direction of rotation, the reversal position adjacent to the resident position is not reached. In either case, the car window glass is not sufficiently cleaned. Furthermore, the field of view of the vehicle occupant is reduced by the wiper remaining stationary within the normal wiping area during downtimes, especially in the case of intermittent wiping operations.

It is an object of the invention to provide a method of the type mentioned at the outset so as to ensure that the entire wiping area between the two reversal positions of a normal continuous wiping operation is wiped in each wiping cycle. The goal is to improve window cleaning equipment.

[Means for solving problems]

According to the invention, the position switch is switched each time at the same position of the drive member, irrespective of the direction of rotation of the motor.

The present invention is based on the following recognition. In other words, the reason why the function of the window cleaning device of the type mentioned at the beginning does not meet the required conditions is not due to some mechanical peculiarity of the eccentric wheel or the crank transmission as a whole, but rather because the position switch This is due to the fact that the rotating drive member is switched at different positions depending on the direction of rotation of this member. If the switching timing is arranged so that the desired pull-down position is reached in one direction of rotation of the motor, the position switch is switched earlier to the rest position in the other direction of rotation, so that the motor is adjacent to the rest position. Before the reversal position, the polarity is already reversed or, in the case of intermittent operation, stopped.

If the position switch and the drive member are synchronized so that the position switch is switched in the normal rotational direction of the motor in a reversed position adjacent to the resident position, the resident position will not be reached with the same eccentric as before. . However, in that case a larger eccentric wheel would solve this problem. However, the present invention does not take this path. Rather, the function of the window cleaning device which satisfies all requirements is achieved by the fact that the position switches are each actuated in the same position of the drive member, irrespective of the direction of rotation.

Based on claim 2, the switch member and the drive member are connected to each other with idle movement interposed therebetween,
The above measures can be implemented particularly easily. The lost movement spans an angle corresponding to the difference between the two positions in which the position switch would be operated if a fixed connection were provided between the switch member and the drive member.

Preferred embodiments of the connection with null movement between the switch element and the drive element are evident in sub-frame sections 3 to 5.

According to claim 6, if the switch member has a bearing portion, and the bearing portion supports the switch member coaxially with the drive member and rotatably relative to the drive member within the range of idle movement. For example, a clear guidance and good mobility of the switch member relative to the drive member is ensured. In that case, Sui.

Preferably, the chain member is configured to be directly supported by the drive member.

According to the structure according to claim 9, the position switch is tripped by the switch member immediately after starting the motor, so that it can be returned to the position it assumes during the majority of one revolution of the drive member. . Therefore, the wiper briefly scrapes the windshield and then returns to the parked position with a simple swipe.

Simply touching the tip is sufficient.

When the position switch includes a lifting contact, it is preferable that the switch member is a cam according to claim 10. In this case, in order that the cam is rotatably supported without significant play and that the positions switch between positions SW and H are instantaneous, the cam is first driven by a drive member upon reversal of the direction of rotation; Initially, it is stopped by the lifting contact. In this way, the cam does not necessarily have to be idle.

According to claim 13, the position switch is constructed as a double-throw switch, the switching contacts of which are selectively connected to the anode or cathode of the source in two switching positions, the double-throw switch being in the resident position and the resident position. It is preferable to have a structure in which the first switching position is taken at the adjacent reversal position and the second switching position is taken at the remaining positions.

〔Example〕

Reference numeral 10 in the drawing designates a unit of motor 11 with permanent magnets used for the drive of at least one wire i4. The motor is supplied with power via connection terminals 12 and 13. A position switch 14 configured as a double-throw switch belongs to the motor. Movable contact 1 of position switch 14
5 is always connected to the connection terminal 16 of the unit 10. The movable contact 15 is connected via the electric current m1g and the output 19 of the ignition switch to the anode of a power source, not shown in detail, and is alternately connected to a connecting terminal 17 that also belongs to the unit 10 or to a connecting terminal 18 that is connected to the cathode 21 of the power source. be done. An electric wire 77 leads from the connection terminal 16 of the unit 10 to a connection terminal 23 of the control device, generally designated 24.

Three different switching positions can be operated by hand.

The operating switch 30 that can be operated belongs to the window cleaning device.

The operation switch 30 has a total of four external connection terminals 31 and 32.
．． 33 and 34. External connection terminal 31 is connected to output 19 of the ignition switch. Wire 3 from connection terminal 32
5 leads to a connection terminal 36 of the control device 24. The connection terminal 33 of the operation switch 30 is connected to the connection terminal 12 of the motor 11.
and the input 37 of the control device 24, and the connection terminal 34 of the operation switch 30 is connected to the connection terminal 38 of the control device 24.

The operation switch 30 has three cylindrical contacts, 45° 46.4
It has 7. These contacts are moved from an intermediate reference position to a continuous wiping operation position and an intermittent wiping operation position when the operating switch 30 is switched. In the reference position and in the intermittent wiping operation position, a bridge contact 46 connects the two connecting terminals 32 and 33 to each other. At the continuous wiping operation position, a positive potential is sent from the connection terminal 31 to the connection terminal 33 via the contact 47. Finally, in the intermittent operating position, the bridge contact 45
sends a positive potential from the connection terminal 31 to the connection terminal 34.

In addition to the aforementioned connection terminals 23, 36.31.38, the control device 24 has four further connection terminals 48.degree. 49.50.51.
The connecting terminal 48 is connected to the output 19 of the ignition switch through the electric wire 18, the connecting terminal 49 is connected to the cathode 21, and the connecting terminal 50 is connected to the connecting terminal 13 of the motor 11 through the electric wire 18. is directly connected to the anode 54 of the power source via the electric flJ53.

In addition to the electronic unit y6o, the control device 24 has three relays 61, 62, 63. One side of the relay coil is connected to the connection terminal 48 and the other side to the unit 60. A moving contact 64, 65, 66 belongs to every relay. The contacts 66 are connected to the connection terminals 23 and 4 of the control device 24.
Move between 8. The contact 65 moves between the connection with the contact 66 of the relay 63 and the connection terminal 49, and is always connected to the connection terminal 36. Finally, the contacts 64 of the relay 6 move between the connecting terminals 48 and 490. 2 relays 6
1 and 62 complement each other, and their movable contacts 64.6
5 constitutes a polarity reversal switch. The relay 63 is a so-called Ishitabaru relay.

The function of the circuit shown in FIG. 1 will now be explained. In that case, the wiper driven by the motor 1 will be in the lowered permanent position, and the individual switches will be in the switching positions shown in the drawings. Motor 11 is then short-circuited. This is because the connection terminal 13 is connected via the electric wire 52, the connection terminal SO of the control device 24, the contact of the relay 61, and the connection terminal 49 of the control device 24, and the connection terminal 12 of the motor 11 is connected to the connection terminal 33, the connection terminal 46, Via the connection terminal 32 of the operation switch 30, the electric wire 35, the connection terminal 36 of the control device 24, the contact 65 of the relay 62, the contact 66 of the relay 63, and the control device 24
connection terminal 23, electric wire 77, connection terminal 16 of ) 10, movable contact 15 of position switch 14, unit 1
This is because it is connected to the cathode of the power source via the connection terminal 20 of 0. All relays are disconnected.

When the operation switch 30 is placed in the continuous operation position, the motor short circuit is first broken by the contact 46. A positive potential is sent to the Tanabata connection 12 and to the connection 37 of the control device 24 via the bridge contact 47 which is connected to the ignition switch connection 19 which is at a positive potential. A positive potential at the connection terminal 37 means that, irrespective of the switching position of the position switch 14, no relays in the control device can be energized. The motor connection terminal 13 is thus grounded.

The motor is therefore started in a predetermined direction of rotation, for example counterclockwise, and moves the side or sides over the windshield of the motor vehicle between an inverted position adjacent to the permanent position and a second inverted position. . As will be explained in detail again based on another figure, the movable contact of the position switch 14 is connected to the connecting terminal 17 of the unit 10 immediately after exiting from the permanent position.
and is transferred to the connection terminal 20 only in the first reversal position of the wiper, each time for a short period of time.

Next, when the operation switch 30 is placed again in the position shown in the figure in order to disconnect the window cleaning device, the connection terminal 12 of the motor 11 is connected to the contact 46 of the operation switch 30 and the control device 2.
4. Continues to remain at positive potential via position switch 14.

This is because, during a normal wiping operation, the movable contact 15 of the position switch 14 is at a positive potential via the connection terminal 17, as long as the wiper 4 is not in the reversed position adjacent to the permanent position. However, when the wiper reaches the reverse position adjacent to the parking position, the movable contact 15 of the position switch 14 and the connection terminal 23 of the control device 24 shift to a negative potential. As a result, the short circuit of the motor 11 is first reclosed via the jack contacts 46 of the actuating switch 30. Two further relays 61, 62 are energized. This does not change the potential of the connection terminal 12 of the motor 11 in any way. However, if after exiting the first reversal position the contact 15 of the position switch 14 is again at a positive potential, a transition of the contact 6E of the relay 62 is necessary in order to keep the connecting terminal 12 at a negative potential.

The connection terminal 13 of the motor 11 is connected via the contact 64 of the relay 61 to the connection terminal 19 of the ignition switch. The motor 11 is thus polarized and changes its direction of rotation starting from the first reversal position of the wiper. The motor then rotates in the other direction of rotation until the contact 15 of the position switch 14 again transfers from the connection terminal 17 to the connection terminal 2o of the unit in the lowered permanent position of the wiper. Ground potential is applied to the control device 24 via the connection terminal 23, and the two relays 61 and 62 are turned off, shorting the motor 11.

When the operation switch 30 is placed in the intermittent operation position, the motor 11
The connection terminal 13 of is grounded via a contact 64 of a relay 61. Since the relay 63 attracts, the connection terminal 12 of the motor 11 is connected to the connection terminal 19 of the ignition switch via the bridge contact 46 of the operation switch 30, the contact 65 of the relay 62, and the contact 66 of the relay 63. The motor is thus started counterclockwise. In the meantime, the contact 15 of the nine-position switch 14, connected to the connecting terminal 17, is connected to the connecting terminal 2 of the unit 10 in the first reversal position after one wiping cycle.
contact o again. Therefore, the relay 63 is turned off during a specific period of time, i.e., the rest time of the intermittent wire 14, and the motor 11
short circuit. After a rest period, the relay is re-energized and l
After the wiping cycle, it will cut again at the first reversal position.

Next, at any time, when the operation switch is placed again in the position shown in the figure to cut off the intermittent operation of the window cleaning device, the motor 11
is reversed in a first reversal position and then rotated in the other direction for one wiping cycle to bring the wiper to its lowered, resident position.

A rotary drive member that assumes the same position in the permanent position and the first reversed position of the wiper 4 belongs to the window cleaning device. In order for the motor to be reversed in each case in the first reversing position and for the wiper to be transferred to the first reversing position during the rest period of intermittent operation, it is important that the position switch 14 is switched independently of the direction of rotation of the motor. They are respectively switched at the same position of the drive member. How this can be guaranteed will be explained in detail in FIGS. 2 to 7.

A power gear box 70 is directly attached to the motor 11. The gear box 20 is closed with a lid 71 and has a bearing hole 77 at the bottom. The crankshaft 74 is inserted into the bearing hole 72 through the bearing bushing 23.
is rotatably supported. A worm wheel 75 is fixed to the crankshaft 74 inside the gear box 70, and the motor 11
It is driven by a worm shaft and forms a rotational driving member.

A switch member 77 is supported on the gosse 76 of the worm wheel 75 extending in the axial direction so as to be rotatable relative to the worm wheel 75 . The switch member is a ring 78 supported on the gosse 76 of the worm wheel 75.
, an overhanging portion 79 projecting in the radial direction at one location of this ring, and a driving ring 80 protruding from the area of the overhanging portion 790.
A cam having: Drive pin 80 axially engages worm wheel 75 extending through an angle.

Since the groove 81 is ffi longer than the diameter of the pin 80, the worm wheel 45 and the cam 77 are connected to each other with idle movement in the rotational direction.

An elevating contact 85 extends tangentially to the cam 77 inside the ear box 70, and one end of the elevating contact 85 is fixed onto the connecting terminal 16 of the unit 10, which is insulated and fixed to the lid 71.

The other end of the lifting contact 85 is located between two connecting terminals 17 and 20 of the unit 10, which are also insulated and fixed to the lid 71.

The lifting contact 85 is normally preloaded so as to be pressed against the connection terminal 17.

Figure 3 shows that the motor is moving 1 in the direction of the arrow, that is, clockwise.
Cam 77 and worm wheel 7 when stationary after rotation
5 shows the position of groove 8.

This is the case in the lowered permanent position. FIG. 4 shows the same components after one rotation counterclockwise and when the motor is at rest. This is the case, for example, after each intermediate cycle in intermittent operation.

Let us now assume, based on the schematic diagram of FIG. 3, that the window cleaning device is connected for continuous operation. In that case, the worm wheel 75 rotates in the direction of arrow B in FIG. 4, opposite to arrow A. Since the forced constraint between cam 77 and worm 75 is large, cam 77 is immediately driven by the worm wheel. Therefore, the cam separates from the lifting contact 85, and the lifting contact 85 changes from the connecting terminal 20 to the connecting terminal 12 at the same time as the rotation starts.
Move to. When the cam 77 rotates approximately 30 degrees, the projecting portion 79 of the cam 77 comes into contact with the lifting contact 85 again. However, the lifting contact 85 is preloaded onto the connecting terminal 17 and holds the bulge 79 until the drive pin 80 moves from one end of the groove 81 to the other and is driven by the worm wheel. Here, the overhanging portion 79 pulls the lifting contact 85 away from the connection terminal 17 and presses it against the connection terminal 20. This arrangement is shown in FIG. As long as the operating switch is in the continuous operating position, no transfer of the lifting contact 85 takes place. On the other hand, in the case of intermittent operation, the motor is stopped. If the operating switch is placed in the reference position in the meantime, the motor is reversed.

After polarity reversal, the worm wheel rotates in the direction of arrow A. The worm wheel first drives the cam 77 again by forced restraint until the cam 77 hits the lifting contact 85. The lifting contact 85 is moved until the drive pin 80 is again moved to the other end of the groove 81 and then driven by the worm wheel 75.
holds the cam 77. Therefore, the overhanging portion 79 of the cam 77
pulls the lifting contact 85 away from the connection terminal 17 and connects the connection terminal 2.
Press it to 0. As can be seen from the position of the groove 8 and the crank 86 relative to the fixed connection terminals 16, 17, 20, the groove 81 and with it the worm wheel 75 and the crank 86 assume the same angular position after the motor has stopped, regardless of the preceding direction of rotation. take. This is ensured by the fact that, because of the idle movement between the worm wheel 75 and the cam 77, the lifting contact 85 contacts the connection terminal 20 in each case at the same position on the worm wheel 75. The position of the worm wheel 75 and the crank 86 then corresponds to the first reversal position of the wiper. The wiper is reversed in a first reversal position before the wiper motor begins the final wiping cycle to enter the lowered, resident position, and during intermittent operation the wiper is in the first reversal position during the rest period. This is the translation. Also, it is in the lowered permanent position that the worm wheel 75 and crank 86 are in the first position.
This means that it is at the same angular position as when it is in the reversed position.

In the structure according to FIGS. 2 to 4, the worm wheel 7
5 and cam 72. are connected to one another axially, whereas in the construction according to FIGS. 5 and 6 this takes place radially. The worm wheel 75 has a drive pin 80 that projects in the radial direction.
has.

Driven 80 engages a cutout 88 in the cam that extends over a predetermined angular range. FIG. 5 shows both members stopped after making one rotation counterclockwise, and FIG. 6 showing them stopped after making one rotation clockwise. In both cases the worm wheel 75 again assumes the same position.

The structure shown in FIG. 7 has a cam 77 and a worm wheel 75.
This indicates that the two overhanging portions 87 and two notches 88 may be engaged.

With reference to FIGS. 2 to 4, it may be pointed out that the worm wheel 75 has, in addition to the groove 81, another groove 90.

The length of groove 90 is slightly different from groove 81. Connection terminal 16
, 17, 20 and the shape and position of the lifting contact 85 have tolerances, so the exact required free movement between the worm wheel 75 and the switch member 77 differs from one to another. For the connection of the worm wheel 75 and the switch member 77, it is then possible to select precisely the groove that allows the idle movement closest to the required idle movement. Of course, depending on the selection of grooves 81 or 90, the relative position between worm wheel 75 and crank 86 must also be selected.

There may be more than one groove in the worm wheel.

〔Effect of the invention〕

According to the present invention, the window glass of the automobile can be sufficiently cleaned between the permanent position and the reversed position, and furthermore, the windshield does not remain stationary within the field of view.

[Brief explanation of drawings]

Fig. 1 is an electrical circuit diagram of a window cleaning device based on the present invention;
The figure is a cross-sectional view of the gear box of the motor belonging to the window cleaning device.
The figure shows the inside of the gear box after the motor has stopped in one direction of rotation, Figure 4 shows the inside of the gear box after the motor has stopped in the other direction of rotation, and Figures 5 and 6 show the inside of the gear box after the motor has stopped in the other direction of rotation. FIG. 7 shows a view of a switch member and a drive member connected to each other by a radial protrusion, and FIG. 11...Motor, 14...Position switch, 30...
- Operation switch, 75... Drive member (tom wheel), 77... Switch member. FQ one

Claims (15)

[Claims] (1) During normal wiping operation, the window wiping device reciprocates between two reverse positions within the wiping area, and after the window wiping device is disconnected by the operation switch (30), it is placed in the lowered permanent position outside the wiping area. drive at least one wiper, which is moved to the window, in one direction of rotation when connecting the window cleaning device and during normal wiping operations, and in the other direction of rotation when the wiper enters the parking position. a rotating motor (11) connected to a power source;
It can be switched via a switch member (77) connected to the rotational drive member (75) of the motor (11), and sends a polarity reversal signal after the operation switch (30) is cut off and sends a motor cutoff signal at the permanent position. In a window cleaning device for an automobile having a position switch (14), the position switch (14)
4) is switched at the same position of the drive member (75) each time, regardless of the direction of rotation of the motor (11). (2) The window cleaning device according to claim 1, characterized in that the switch member (77) and the drive member (75) are connected to each other with idle movement interposed therebetween. (3) characterized in that one of the two members (75, 77) connected to each other engages with a larger cavity (81, 88) in the other member by means of a protrusion (80, 87); A window cleaning device according to claim 2. (4) The window cleaning device according to claim 3, wherein the projection (80) engages with the cavity (81) in the axial direction of the drive member (75). (5) The window cleaning device according to claim 3, characterized in that the protrusion (87) engages with the cavity (88) in a radial direction with respect to the axis of the drive member (75). . (6) the switch member (77) has a mounting part, preferably a ring (78), which ring coaxially with the drive member (75) and rotates relative to the drive member (75) within the range of idle movement; Window cleaning device according to any one of claims 2 to 5, characterized in that it is mounted in such a way that the window cleaning device can be mounted in such a manner that the window cleaning device can be mounted in such a manner that the window cleaning device can be mounted in such a manner that the window cleaning device can be mounted in such a manner that the window cleaning device can be mounted in such a manner that the window cleaning device can be mounted in such a manner that the window cleaning device can be mounted in such a manner that the window cleaning device can be mounted in such a manner that the window cleaning device can be mounted in such a manner that the window cleaning device can be mounted in such a manner that the window cleaning device can be mounted in such a manner that the window cleaning device can be mounted in such a manner that the window cleaning device can be mounted in such a manner that the window cleaning device can be mounted in such a manner that the window cleaning device can be mounted in such a manner that the window cleaning device can be mounted in such a manner that the window cleaning device can be mounted in such a manner that the window cleaning device can be mounted in such a manner that the window cleaning device can be mounted in a manner that allows the window cleaning device to do so. (7) A window cleaning device according to claim 6, characterized in that the switch member (77) is directly supported on the drive member (75). (8) Claims 1 to 7, characterized in that a gear of a transmission device belonging to the motor (11), in particular a worm wheel (75) of a worm gear, is a driving member.
The window cleaning device according to any one of paragraphs. (9) When the motor (11) starts from the permanent position, the switch member (77) is driven by the drive member (75) in a forced restraint manner, and the position switch (14) immediately returns to its original position. Window cleaning device according to any one of claims 2 to 8, characterized in that, before the first actuation of ), the switch member (77) is held until the end of the idle movement. . (10) A lifting contact (85) belongs to the position switch (14), and the switch member is a cam (77), according to any one of claims 1 to 9. window cleaning equipment. (11) When the rotation direction is reversed, the cam (77) is first driven in a forced restraint manner by the drive member (75), and is initially stopped by the lifting contact (85).
A window cleaning device according to claim 9 or 10. (12) Contacts (17, 20, 8) of position switch (14)
5) is located inside the cover (71) of the gear box (70) belonging to the motor (11), according to any one of claims 1 to 11. Wiping device. (13) The position switch (14) is configured as a double-throw switch, the switching contact (85) of which is connected alternately to the anode or cathode (19, 21) of the power supply in two switching positions, with the double-throw switch in the permanent position. and a first switching position in the reversed position adjacent to the resident position, and a second switching position in the remaining position.
The window cleaning device according to any one of paragraphs. (14) The switch member (77) and the drive member (75), especially the gears of the transmission device belonging to the motor (11), are connected to each other at a plurality of relative positions, and the idle motion of different connecting parts is different. A window cleaning device according to any one of claims 2 to 13. (15) Claim 14, characterized in that one member (75) has a plurality of cavities (81, 90) for the protrusions (80) of the other member (77). The window cleaning device described in .